Hydrodynamic Influences in Dissolved Air Flotation

A. Hassan*, N. Genidi, Hamad Bin Khalifa University, Qatar

Hydrodynamic conditions of dissolved air flotation (DAF) will be addressed in this work include: bubble formation and size, bubble-particle interactions, measures of supplied air, and modeling of the reaction and clarification zones of the flotation tank. Milky water in the contact zone in the flotation tank influences the hydrodynamic conditions, collision rate and dissolved air bubbles, which the turbulent conditions can result in shear forces that destroy agglomerates already formed and thus have a negative impact on the flotation process. The objective of this study is to evaluate the influence of the hydrodynamic behavior of a dissolved air flotation system to increase the efficiency of the milky water, which the air bubble moving through water have less drag than the sold particles. A conceptual model for the bubble-particle reaction zone based on the single collector collision efficiency is summarized and discussed. An alternative modeling approach is considered...

Session: L18 - Froth Flotation and Liquid/Gas Separation
Day: 24 October 2019
Time: 13:00 - 14:15 h

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